Ore-crushing machine.



No'. 709,822. y l Patented sept. 23, |902..

^ c. C" LANE.

one cnusHmG MACHINE.

(Application filed Nov. 1B, 1899.)

um Model.)

W70/iwf ya lINITnD Sterns PATENT OFFICE.

CHARLESC. LANE, OF LOS ANGELES, CALIFORNIA.

ORE-CRUSHING MACHINE. l

SPECIFICATION forming part of Letters Patent No. 709,822, datedSeptember 23, 1 902.

Application filed November 18. 1899. Serial No. 737,518. (No model.)

.T0 all whom t may concern:

Be it known that 1, CHARLES C. LANE, a citizen of the United States,residing at Los Angeles, in the county of Los Angeles, State ofCalifornia, have invented new and useful Improvements in Ore-CrushingMachines, of which the following is a specification.

My invention relates to improvements in that class of ore-crushingmachines in which crushing-rolls are caused to travel upon dies formedof bars situate in the bottom of an annular trough which forms the treadfor the rolls; and the object thereof is to provide a machine of simpleconstruction that will crush the ore to a predetermined degree ofiineness, depending upon the distance apart of the bars forming thetread of the rolls. I accomplish this object by the mechanism describedherein and illustrated in the accompanying drawings, in which- Figure lis a plan view of myore-crusher with the crushing-rolls and parts of theframe and shaft removed for clearness of illustration. Fig. 2 is a sideview, partly in elevation and partlyin vertical section, of myorecrusher with certain parts removed, the removed parts being ofordinary construction and the vertical section being` taken on the line2 2 of Fig. l. f

The upper part of my improved ore-Crusher, including theshaft,crushingrolls, and frame, is preferably of the construction shownin the United States patent granted to me Aprilll, 1899, No.` 623,088.In the construction shown in that patent the tread was made solid topulverize the ore. In my improved orecrusher the bars forming the treadare placed at a predetermined distance apart, so that when the ore isbroken into pieces of the required fineness they will drop between. thebars and be collected and taken away for further treatment. Thecrushing-rolls A break the oreinto small pieces, which drop betweeen thebars B of the tread as soon as they reach the desired degree offineness, which is de termined by the distance between the bars of thetread. The-bars forming the tread have a slight vibratory movement toprevent the ore from Wedging between them and are supported by supportsJ, which are narrower than lthe bar and which rest on suitable supportsin the bottom part of the mill. The supports .I may be dispensed with bymaking the bars B stronger than is necessary when used with suchsupports. YI prefer their use, as it enables me to almost completelyWear out bars B before it is necessary to replace them. If they areomitted, the bars B must be replaced as soon as they are worn, so thatthere is danger of their breaking from the weight of the crushing-rolls.These concentric ringsrest upon supports J, and each ring is enoughlarger than the one next to it toward the center to permit the ore whenit is crushed to the desired fineness to pass through the spaces leftbetween the rings. As the rolls bear on these rings at four differentpoints at the same time, their weight and movement in differentdirections, each roll having a sliding motion as well as a rolling one,keep them in place. The sliding motion of the roll causes a slightvibratory motion of the rings as the rolls pass over the dif-l ferentparts of the tread. As the ore drops between the bars it falls uponscreen O, which permits the veryne ore to pass through and fall upondeilecting-plate D, from which it slides into trough E, while thecoarser particles slide down screen O into trough E.

Attached to the frame which carries the crushing-rolls are two dependingarms G, on the lower ends of which are Scrapers H to carry the orecollected in troughs E and F to the outlet-spouts I in the bottom oftroughs E and F, which carry the ore out of the machine.

If it is not desired to separate the crushed ore into two grades, thedeilecting-plate D and trough E, one arm, and scraper may be dispensedwith, and the screen C may be a ldeilecting-plate, or thedeflecting-plate could IOO spaces therebetween; supports for said rings;hereunto subscribed my name, this 11th day screens below the tread,adapted to deflect ofNovemher,1899,atLosAngelesaiifornia.

the crushed ore into the troughs at the side of and below the tread;arms affixed to the CHARLES C' LANE' 5 revolving frame, having Scrapersou the bot- Witnesses:

tom thereof adapted to work in seid troughs. G. E. HARPHAM,

In witness that I claim the foregoing I have FANNIE BENJAMIN.

